RFE for OpenAM to reduce the filesize of main.js in XUI

Opening this request on behalf of our customer to reduce the size of the main.js file.  

Customer reports on AM 5.5.1
I am currently helping upgrade to AM 5.5.1 within my organization and working on customizing the XUI components. The stock main.js file used by the XUI currently sits at ~558 KB, but this is too much for our needs.

How can this file be minimized? 

There was a similar  OPENIDM-8070 document process for building and redeploying main.js but that was closed/rejected as it was getting too customized to properly support.  As in Support would never be able tell if the customer reporting an issue on standard OOTB functionality is using a custom main.js or not (unless it is always provided and noted in each customer case...).

Also -  CUI-62 Ability to load javascript modules asynchronously, as needed.   Is listed as fixed and it looks like there were changes in AM 6+ breaking out the *.js files in the same location.  But I'm not 100% sure, so opening this RFE today to learn if this is a valid request or work has been done... And if anything can be done in AM 5.5.1 (TBD).